Finally got an "honest" answer from one of those "police benevolence " organizations. I stopped him in the middle of his spiel and asked how much $$ police officers actually saw from his organization. The answer 12% after "expenses"
I politely told him I'd support the blue by giving directly to my local police dept.
edit
While I probably can't make direct donations, things like giving to their annual food drives, Christmas charities, etc still work better than giving to some private "non profit" coffers.